Hi Noam, Thanks.
Just increased both MEMP_NUM_PBUF to 50, MEM_NUM_TCP_PCB TO 15. I'm not sure if its harder to reproduce(longer time to run) - maybe. but it still happens.. On Tue, Nov 7, 2017 at 5:36 PM, Noam Weissman <[email protected]> wrote: > Hi, > > > > Check that you have MEMP_NUM_PBUF 50 or more > > that MEMP_NUM_TCP_PCB is 15 or more > > > > The above may help, I think. > > > > Noam. > > > > *From:* lwip-users [mailto:[email protected]] *On > Behalf Of *Itzik Levi > *Sent:* Tuesday, November 07, 2017 5:29 PM > *To:* Mailing list for lwIP users > *Subject:* Re: [lwip-users] Lwip tcp-stack reliability issue when using > non-reliable network? > > > > Unfortunately, enabling Nagle did not do the trick, still got the same > result. :( > > > > On Tue, Nov 7, 2017 at 4:20 PM, Itzik Levi <[email protected]> wrote: > > Thanks for the reply! > > > > Actually, the end goal is to integrate the solution into rfcomm. > > > > For now, the "physical layer" is being simulated by a single local host > tcp connection(under Android OS). > > The losses are simulated by simply randomly dropping data in lwip's pppos " > output_cb". > > > > I'll attempt to re-enable Nagle, see if there is any changes and report > back. > > > > > > > > On Tue, Nov 7, 2017 at 4:09 PM, Gisle Vanem <[email protected]> wrote: > > Itzik Levi wrote: > > I'll go over your lwipopts and see whether I missed something. > In addition, I will attempt to useSO_SNDTIMEO and SO_RCVTIMEO instead of > polling in parallel to write and read(I understand by the samples its a > more health way of using this api). > > If you have anymore suggestions, that will be great! > > > I think you wrote earlier than you had disabled > "Nagle algorithm". Are you sure that's a good idea? > Maybe you're saturating your RF-link with small fragments. > > Just a thought since it's almost never a good idea to > turn off Nagle. > > -- > --gv > > > > _______________________________________________ > lwip-users mailing list > [email protected] > https://lists.nongnu.org/mailman/listinfo/lwip-users > > > > > > _______________________________________________ > lwip-users mailing list > [email protected] > https://lists.nongnu.org/mailman/listinfo/lwip-users >
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